Cat Chronic Kidney Disease Staging and Management

Chronic kidney disease is among the most common serious conditions in older cats, with staging guiding treatment and improving quality of life.

Key Facts

CKD affects roughly 30-40% of cats over age 10 and up to 80% of cats over 15
The IRIS staging system (1-4) uses creatinine and SDMA levels to guide treatment decisions
SDMA testing can detect CKD up to 17 months earlier than creatinine alone
Stage 1-2 cats often show no obvious symptoms despite significant kidney damage
Phosphorus restriction is critical - high phosphorus accelerates kidney deterioration
Subcutaneous fluid therapy at home can dramatically improve quality of life for Stage 3-4 cats
Many cats live comfortably for years after CKD diagnosis with appropriate management

Welfare Considerations

CKD causes gradual accumulation of toxins that make cats feel chronically unwell - nausea, lethargy, and reduced appetite are common. Early detection and phosphorus-controlled diets can slow progression significantly. Home fluid therapy reduces hospitalization stress and allows cats to remain in familiar environments.

What You Can Do

Schedule annual senior wellness bloodwork for cats over age 7
Transition CKD cats to phosphorus-controlled prescription diets as recommended
Learn subcutaneous fluid administration techniques to reduce clinic visits
Monitor water intake, appetite, and body weight weekly
Ask your vet about anti-nausea medications to improve appetite and comfort